This game is very simple, you are a grey square which you do control with the arrow keys. You must reach the finish (marked "FIN") without letting the blue squares touch you. If they do, you will have to restart the level. In this game, there's 30 levels. They are quite easy at the start, but they get harder (all levels are although beatable, I've beaten all of them myself).
So, it's a very simple game, with high replay value, which I hope you will have loads of fun with!